Finding consecutive multiples (1,000 and 10,000) | 3rd grade math (TX TEKS) | Khan Academy

- [Instructor] We're told Sabrina walked

about 80,000 steps in a week.

Which point on the number
line could represent

how many steps Sabrina walked?

So pause this video,

and have a go before we
work on this together.

All right, so it looks like
they've labeled three points,

and they are all between
70,000 and 80,000.

And when they say about 80,000 steps,

they're saying it's not exactly 80,000,

but if we were to estimate,
if we were to round,

then we would get to 80,000.

Now if we have three points
that are between 70 and 80,000,

the ones that are less than halfway

of the way between 70 and 80,000,

they would round back to 70,000.

Or another way to think about it,

if you're rounding to the nearest 10,000,

point A and B would round to 70,000.

But we see that point
C is more than halfway.

This is a halfway point right over here.

C is more than halfway
from 70,000 to 80,000.

Another way to think about it is closer

to 80,000 than 70,000.

And so if you had to estimate this,

or say what was about, and
round to the nearest to 10,000,

you would go to 80,000.

And so that's why I like point C.